Chili's, Cheesecake Factory, KFC, Micky D's ... It's all total shit, and it's part of what's making America sick, poor, and prematurely dead. (Poor because of our health care entitlements and effect on our debt).
As enumerated by other posters, it's high in calories (obesity), high in refined carbs (diabetes), high in sodium (high blood pressure). No redeeming nutritional value.
I'm gonna add Starbucks to the list, too, but then admit it's my "go to" place for a small, reasonably priced dessert every now and then (read: brownie). But golook at the calories in a grande latte, even with skim milk, and you'll likely be shocked outta your mind.
But if you're reading this thread, it's preaching to the choir, right?